{"id":99113,"date":"2026-02-10T00:15:18","date_gmt":"2026-02-09T23:15:18","guid":{"rendered":"https:\/\/www.infokuryr.cz\/n\/?p=99113"},"modified":"2026-02-09T12:35:10","modified_gmt":"2026-02-09T11:35:10","slug":"vedci-z-cdc-vyvijeji-novy-chimericky-frankenvirus-ktery-kombinuje-fuzni-protein-viru-nipah-s-pateri-paramyxoviru","status":"publish","type":"post","link":"https:\/\/www.infokuryr.cz\/n\/2026\/02\/10\/vedci-z-cdc-vyvijeji-novy-chimericky-frankenvirus-ktery-kombinuje-fuzni-protein-viru-nipah-s-pateri-paramyxoviru\/","title":{"rendered":"V\u011bdci z CDC vyv\u00edjej\u00ed nov\u00fd chim\u00e9rick\u00fd Frankenvirus, kter\u00fd kombinuje f\u00fazn\u00ed protein viru Nipah s p\u00e1te\u0159\u00ed paramyxoviru"},"content":{"rendered":"
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N\u011bkter\u00e9 konstrukty jsou pro savce 100% smrteln\u00e9<\/span><\/strong><\/h3>\n

Nov\u00e1, recenzovan\u00e1 studie uv\u00e1d\u00ed, \u017ee vl\u00e1dn\u00ed v\u011bdci geneticky modifikovali \u017eiv\u00fd chim\u00e9rick\u00fd virus paramyxoviru, kter\u00fd z\u00edskal novou membr\u00e1novou f\u00fazi, interakci s hostitelskou bu\u0148kou a imunologick\u00e9 funkce odvozen\u00e9 od viru Nipah, jak odhalily metody a v\u00fdsledky t\u00e9to pr\u00e1ce.<\/span><\/p>\n

Tento krok p\u0159ich\u00e1z\u00ed pot\u00e9, co \u0159editel NIH Dr. Jay Bhattacharya ned\u00e1vno prohl\u00e1sil, \u017ee takov\u00e9 experimenty nebudou za Trumpovy administrativy prov\u00e1d\u011bny.<\/span><\/p>\n

\u201eNikde ve vl\u00e1d\u011b Spojen\u00fdch st\u00e1t\u016f u\u017e nikdy nebudeme investovat do projektu, kter\u00fd p\u0159edstavuje riziko katastrof\u00e1ln\u00edch \u0161kod pro americk\u00fd lid,\u201c \u0159ekl\u00a0<\/span>den\u00edku Just the News<\/span><\/em>\u00a0.<\/span><\/p>\n

V experimentech na zv\u00ed\u0159atech v r\u00e1mci nov\u00e9 studie v\u0161ak n\u011bkter\u00e9 z geneticky modifikovan\u00fdch variant viru vedly u my\u0161\u00ed k jednotn\u00fdm fat\u00e1ln\u00edm v\u00fdsledk\u016fm, p\u0159i\u010dem\u017e v\u0161echna naka\u017een\u00e1 zv\u00ed\u0159ata musela b\u00fdt kv\u016fli t\u011b\u017ek\u00e9mu onemocn\u011bn\u00ed utracena.<\/span><\/p>\n

Uv\u00e1d\u00ed se, \u017ee geneticky modifikovan\u00fd \u201eFrankenvirus\u201c byl vytvo\u0159en vlo\u017een\u00edm f\u00fazn\u00edho genu viru Nipah (NiV-F) do p\u00e1te\u0159e paramyxoviru (J-virus), co\u017e umo\u017enilo v\u00fdsledn\u00e9 chim\u00e9\u0159e exprimovat f\u00fazn\u00ed mechanismy specifick\u00e9 pro Nipah, interagovat s hostitelsk\u00fdmi bu\u0148kami prost\u0159ednictv\u00edm ciz\u00edho virov\u00e9ho vstupn\u00edho proteinu a fungovat jako virus prezentuj\u00edc\u00ed antigen Nipah \u2013 schopnosti, kter\u00e9 p\u016fvodn\u00ed virus p\u0159ed genetickou modifikac\u00ed nem\u011bl.<\/span><\/p>\n

Studie, publikovan\u00e1<\/a>\u00a0v\u010dera v\u00a0<\/span>\u010dasopise npj Vaccines<\/span><\/em><\/a>\u00a0, zahrnuje autory spojen\u00e9 s Centry pro kontrolu a prevenci nemoc\u00ed, konkr\u00e9tn\u011b s pobo\u010dkou pro speci\u00e1ln\u00ed virov\u00e9 patogeny Divize vysoce z\u00e1va\u017en\u00fdch patogen\u016f a patologie, spolu s akademick\u00fdmi spolupracovn\u00edky.<\/span><\/p>\n

Vl\u00e1dn\u00ed v\u011bdci tvrd\u00ed, \u017ee se jim poda\u0159ilo vytvo\u0159it nov\u00fd, laboratorn\u011b vytvo\u0159en\u00fd virus spojen\u00edm \u010d\u00e1st\u00ed dvou r\u016fzn\u00fdch vir\u016f, \u010d\u00edm\u017e mu dali nov\u00e9 funkce, kter\u00e9 d\u0159\u00edve p\u0159irozen\u011b nem\u011bl.<\/span><\/p>\n

Auto\u0159i, kte\u0159\u00ed spolupracuj\u00ed s CDC, uv\u00e1d\u011bj\u00ed, \u017ee vytvo\u0159ili n\u011bkolik variant rekombinantn\u00edho J-viru (JPV) za pou\u017eit\u00ed technik reverzn\u00ed genetiky.<\/span><\/p>\n

V dokumentu se uv\u00e1d\u00ed:<\/span><\/p>\n

\u201eVytvo\u0159ili jsme n\u011bkolik rekombinantn\u00edch mutant\u016f JPV (rJPV) a testovali jsme jejich patogenitu u my\u0161\u00ed.\u201c<\/span><\/em><\/p>\n

To potvrzuje zjevn\u011b celogenomovou konstrukci replikuj\u00edc\u00edch se paramyxovir\u016f, nikoli pouze neinfek\u010dn\u00edch \u010d\u00e1stic nebo pseudotypovan\u00fdch syst\u00e9m\u016f.<\/span><\/p>\n

Vlo\u017een\u00ed f\u00fazn\u00edho genu viru Nipah<\/span><\/strong><\/h3>\n

Studie dokumentuje vlo\u017een\u00ed funk\u010dn\u00edho genu viru Nipah do genomu paramyxoviru.<\/span><\/p>\n

Auto\u0159i p\u00ed\u0161\u00ed:<\/span><\/p>\n

\u201eKompletn\u00ed f\u00fazn\u00ed gen (NiV-F) z malajsk\u00e9ho kmene NiV byl vlo\u017een m\u00edsto JPV SH.\u201c<\/span><\/em><\/p>\n

NiV-F k\u00f3duje virov\u00fd f\u00fazn\u00ed protein zodpov\u011bdn\u00fd za f\u00fazi membr\u00e1n a vstup do hostitelsk\u00e9 bu\u0148ky b\u011bhem infekce virem Nipah a nen\u00ed p\u0159irozen\u011b sou\u010d\u00e1st\u00ed viru J.<\/span><\/p>\n

Potvrzen\u00ed exprese f\u00fazn\u00edho proteinu Nipah<\/span><\/strong><\/h3>\n

Auto\u0159i potvrdili, \u017ee geneticky modifikovan\u00fd virus aktivn\u011b exprimoval f\u00fazn\u00ed protein viru Nipah b\u011bhem infekce.<\/span><\/p>\n

V dokumentu se uv\u00e1d\u00ed:<\/span><\/p>\n

Exprese NiV-F v bu\u0148k\u00e1ch Vero infikovan\u00fdch rJPV-\u03943-NiV-F-LW-L byla potvrzena Western blotem.<\/span><\/em><\/p>\n

To dokazuje, \u017ee chim\u00e9ra produkovala a transportovala funk\u010dn\u00ed protein viru Nipah, sp\u00ed\u0161e ne\u017e aby pouze nesla inertn\u00ed genetickou vlo\u017eku.<\/span><\/p>\n

Funk\u010dn\u00ed vlastnosti z\u00edskan\u00e9 chim\u00e9rou<\/span><\/strong><\/h3>\n

Vlo\u017een\u00ed f\u00fazn\u00edho genu viru Nipah dalo viru nov\u00e9 biologick\u00e9 vlastnosti, kter\u00e9 nebyly p\u0159\u00edtomny u mate\u0159sk\u00e9ho paramyxoviru.<\/span><\/p>\n

Prost\u0159ednictv\u00edm exprese NiV-F z\u00edskal geneticky modifikovan\u00fd virus schopnost prov\u00e1d\u011bt specifick\u00e9 membr\u00e1nov\u00e9 f\u00faze a interakce s hostitelskou bu\u0148kou viru Nipah, \u010d\u00edm\u017e roz\u0161\u00ed\u0159il sv\u016fj f\u00fazn\u00ed apar\u00e1t nad r\u00e1mec nativn\u00edch protein\u016f paramyxoviru.<\/span><\/p>\n

To p\u0159edstavuje kvalitativn\u00ed zm\u011bnu v biologii vir\u016f, jeliko\u017e chim\u00e9ra z\u00edskala aktivitu f\u00faze s ciz\u00edmi organismy a nov\u00e9 formy interakce s hostitelem.<\/span><\/p>\n

Modifikace tak\u00e9 zm\u011bnila imunologickou identitu viru.<\/span><\/p>\n

Zat\u00edmco p\u016fvodn\u00ed virus exprimoval v\u00fdhradn\u011b antigeny paramyxoviru, geneticky modifikovan\u00fd virus prezentoval antigeny viru Nipah, co\u017e mu umo\u017enilo vyvolat imunitn\u00ed odpov\u011bdi specifick\u00e9 pro Nipah.<\/span><\/p>\n

Zm\u011bn\u011bn\u00e1 a zes\u00edlen\u00e1 replikace v bun\u011b\u010dn\u00e9 kultu\u0159e<\/span><\/strong><\/h3>\n

N\u011bkolik geneticky modifikovan\u00fdch variant vykazovalo pozm\u011bn\u011bnou replika\u010dn\u00ed dynamiku, p\u0159i\u010dem\u017e n\u011bkter\u00e9 vykazovaly vy\u0161\u0161\u00ed virov\u00e9 titry ne\u017e nemodifikovan\u00fd virus.<\/span><\/p>\n

Auto\u0159i uv\u00e1d\u011bj\u00ed:<\/span><\/p>\n

\u201eTitr rJPV-\u0394SH\u0394SP p\u0159ekro\u010dil titr rJPV od 4 dpi a udr\u017eel si titr p\u0159es 7 log10, zat\u00edmco titr viru rJPV po dosa\u017een\u00ed vrcholu klesal.\u201c<\/span><\/em><\/p>\n

U jin\u00e9 varianty se p\u00ed\u0161e:<\/span><\/p>\n

\u201erJPV-\u03943 dos\u00e1hl v bu\u0148k\u00e1ch Vero v\u00fdznamn\u011b vy\u0161\u0161\u00edch virov\u00fdch titr\u016f ne\u017e rJPV po 72, 96 a 120 hodin\u00e1ch po infekci.\u201c<\/span><\/em><\/p>\n

100% \u00famrt\u00ed v experimentech na my\u0161\u00edch<\/span><\/strong><\/h3>\n

Studie konzistentn\u011b uv\u00e1d\u00ed fat\u00e1ln\u00ed v\u00fdsledky u ur\u010dit\u00fdch skupin my\u0161\u00ed infikovan\u00fdch specifick\u00fdmi rekombinantn\u00edmi viry.<\/span><\/p>\n

Pokud jde o konstruovanou variantu, auto\u0159i uv\u00e1d\u011bj\u00ed:<\/span><\/p>\n

\u201eV\u0161echny my\u0161i s rozli\u0161en\u00edm ni\u017e\u0161\u00edm ne\u017e 6 dpi musely b\u00fdt z humanit\u00e1rn\u00edch d\u016fvod\u016f utraceny.\u201c<\/span><\/em><\/p>\n

V jin\u00e9 experiment\u00e1ln\u00ed skupin\u011b v\u00fdsledky uv\u00e1d\u011bj\u00ed:<\/span><\/p>\n

\u201eA\u017e do 7 dpi musely b\u00fdt 3 z 5 infikovan\u00fdch my\u0161\u00ed utraceny kv\u016fli siln\u00e9mu \u00fabytku hmotnosti.\u201c<\/span><\/em><\/p>\n

Tyto v\u00fdsledky dokumentuj\u00ed 100% \u00famrt\u00ed u n\u011bkter\u00fdch skupin my\u0161\u00ed, zat\u00edmco jin\u00e9 geneticky modifikovan\u00e9 varianty zp\u016fsobily z\u00e1va\u017en\u00e1, ale ne jednotn\u011b smrteln\u00e1 onemocn\u011bn\u00ed.<\/span><\/p>\n

Z\u00edsk\u00e1n\u00ed ochrann\u00e9 funkce specifick\u00e9 pro Nipah<\/span><\/strong><\/h3>\n

Um\u011ble vytvo\u0159en\u00fd virus tak\u00e9 z\u00edskal novou imunologickou funkci, kter\u00e1 u p\u016fvodn\u00edho viru nebyla.<\/span><\/p>\n

Auto\u0159i uv\u00e1d\u011bj\u00ed:<\/span><\/p>\n

\u201eJednor\u00e1zov\u00e1 intranaz\u00e1ln\u00ed imunizace s rJPV-\u03943-NiV-F-LW-L indukovala \u00faplnou ochranu proti let\u00e1ln\u00ed infekci NiV u k\u0159e\u010d\u010d\u00edho modelu.\u201c<\/span><\/p>\n

To ukazuje, \u017ee chim\u00e9ra fungovala jako imunogen specifick\u00fd pro Nipah.<\/span><\/p>\n

Z\u00e1v\u011br<\/span><\/strong><\/h3>\n

Studie dokumentuje vznik \u017eiv\u00e9 chim\u00e9ry paramyxoviru, kter\u00e1 z\u00edskala novou membr\u00e1novou f\u00fazi, interakci s hostitelem a imunologick\u00e9 funkce odvozen\u00e9 od viru Nipah.<\/span><\/p>\n

N\u011bkter\u00e9 geneticky modifikovan\u00e9 varianty zp\u016fsobovaly u my\u0161\u00ed jednotn\u011b smrteln\u00e1 onemocn\u011bn\u00ed, zat\u00edmco virus z\u00e1rove\u0148 z\u00edskal schopnost indukovat ochrannou imunitu specifickou pro Nipah \u2013 biologick\u00e9 vlastnosti, kter\u00e9 u p\u016fvodn\u00edho viru p\u0159ed genetickou modifikac\u00ed neexistovaly.<\/span><\/p>\n

Proto\u017ee studie specificky vytvo\u0159ila \u017eiv\u00fd virus tak, aby z\u00edskal nov\u00e9 biologick\u00e9 funkce \u2013 v\u010detn\u011b aktivity f\u00faze membr\u00e1n ciz\u00edch organism\u016f, pozm\u011bn\u011bn\u00fdch interakc\u00ed hostitelsk\u00fdch bun\u011bk, vylep\u0161en\u00fdch replika\u010dn\u00edch vlastnost\u00ed a let\u00e1ln\u00edch patogenn\u00edch \u00fa\u010dink\u016f u zv\u00ed\u0159at \u2013 kter\u00e9 u rodi\u010dovsk\u00e9ho viru nebyly p\u0159\u00edtomny, spl\u0148uje tato pr\u00e1ce standardn\u00ed v\u011bdeckou definici v\u00fdzkumu zam\u011b\u0159en\u00e9ho na zisk funkce.<\/span><\/p>\n

Od Jona Fleetwooda<\/span><\/em><\/strong><\/p>\n<\/div>\n<\/div>\n

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Zdroj<\/span><\/a><\/span><\/h3>\n

 <\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

N\u011bkter\u00e9 konstrukty jsou pro savce 100% smrteln\u00e9 Nov\u00e1, recenzovan\u00e1 studie uv\u00e1d\u00ed, \u017ee vl\u00e1dn\u00ed v\u011bdci geneticky…<\/p>\n","protected":false},"author":2,"featured_media":99114,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[7],"tags":[1037,794,1337,2009],"_links":{"self":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/posts\/99113"}],"collection":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/comments?post=99113"}],"version-history":[{"count":0,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/posts\/99113\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/media\/99114"}],"wp:attachment":[{"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/media?parent=99113"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/categories?post=99113"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.infokuryr.cz\/n\/wp-json\/wp\/v2\/tags?post=99113"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}